Self-consistent modelling of aromatic dust species and extinction curves in galaxy evolution

Abstract

We formulate and calculate the evolution of dust in a galaxy focusing on the distinction among various dust components -- silicate, aromatic carbon, and non-aromatic carbon. We treat the galaxy as a one-zone object and adopt the evolution model of grain size distribution developed in our previous work. We further include aromatization and aliphatization (inverse reaction of aromatization). We regard small aromatic grains in a radius range of 3--50 Å as polycyclic aromatic hydrocarbons (PAHs). We also calculate extinction curves in a consistent manner with the abundances of silicate and aromatic and non-aromatic carbonaceous dust. Our model nicely explains the PAH abundance as a function of metallicity in nearby galaxies. The extinction curve become similar to the Milky Way curve at age $\sim$ 10 Gyr, in terms of the carbon bump strength and the far-ultraviolet slope. We also apply our model to starburst galaxies by shortening the star formation time-scale (0.5 Gyr) and increasing the dense-gas fraction (0.9), finding that the extinction curve maintains bumpless shapes (because of low aromatic fractions), which are similar to the extinction curves observed in the Small Magellanic Cloud and high-redshift quasars. Thus, our model successfully explains the variety in extinction curve shapes at low and high redshifts.

15 pages, 9 figures, accepted for publication in MNRAS

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Cited by in corpus (26)

• A Nearby Galaxy Perspective on Dust Evolution. Scaling relations and constraints on the dust build-up in galaxies with the DustPedia and DGS samples
• First Light And Reionisation Epoch Simulations (FLARES) II: The Photometric Properties of High-Redshift Galaxies
• Dust attenuation evolution in $z\sim 2$-$12$ JWST galaxies
• The Role of Acetylene in the Chemical Evolution of Carbon Complexity
• Dust attenuation law in JWST galaxies at z = 7-8
• Density modulated star formation efficiency: implications for the observed abundance of ultra-violet luminous galaxies at z>10
• Galaxies with grains: unraveling dust evolution and extinction curves with hydrodynamical simulations
• The Origin of the Dust Extinction Curve in Milky Way-like Galaxies
• Evidence that Shocks Destroy Small PAH Molecules in Low-luminosity Active Galactic Nuclei
• A Dusty Locale: Evolution of Galactic Dust Populations from Milky Way to Dwarf-Mass Galaxies
• A Framework for Modeling Polycyclic Aromatic Hydrocarbon Emission in Galaxy Evolution Simulations
• Geometry effects on dust attenuation curves with different grain sources at high redshift
• Metal and dust evolution in ALMA REBELS galaxies: insights for future JWST observations
• The 2175 Å dust feature in star-forming galaxies at $1.3\le z\le 1.8$: the dependence on stellar mass and specific star formation rate
• Evolution of the grain size distribution in Milky Way-like galaxies in post-processed IllustrisTNG simulations
• Spectral energy distributions of dust and PAHs based on the evolution of grain size distribution in galaxies
• Evolution of dust grain size distribution and grain porosity in galaxies
• Evolution of grain size distribution with enhanced abundance of small carbonaceous grains in galactic environments
• Effects of dust sources on dust attenuation properties in IllustrisTNG galaxies at $z\sim 7$
• Polycyclic aromatic hydrocarbons destruction in star-forming regions across 42 nearby galaxies
• Observational signatures of the dust size evolution in isolated galaxy simulations
• Effects of dust grain size distribution on the abundances of CO and H${}_2$ in galaxy evolution
• Cosmic evolution of grain size distribution in galaxies using the ${\nu }^2$GC semi-analytic model
• Dust SEDs in Milky Way-like galaxies in the IllustrisTNG simulations based on the evolution of grain size distribution
• CO-to-H${}_2$ conversion factor and grain size distribution through the analysis of ${\alpha }_{\mathrm{CO}}$-$q_{\mathrm{PAH}}$ relation
• Ashes of FIRE: Modeling Dust Grain Size Evolution in the Local Group with FIRE